Connection arrangements, dowel and furniture

ABSTRACT

A connection arrangement for connecting a first furniture part ( 10 ) to a second furniture part ( 20 ), wherein the first furniture part ( 10 ) comprises: a dowel ( 11 ) and one or more abutment surfaces ( 13 ) extending circumferentially (C) around or being distributed circumferentially (C) around the dowel ( 11 ), wherein the second furniture part ( 20 ) comprises: a through-going opening ( 22 ) extending through a wall ( 21 ) and one or more abutment surfaces ( 23 ) extending circumferentially (C) around or being distributed circumferentially (C) around the through-going opening ( 22 ), wherein the connection arrangement further comprises a connection member ( 30 ) having a recess ( 31 ), the recess ( 31 ) having a locking portion ( 31   b ) being configured to receive the dowel ( 11 ) by a relative motion between the connection member ( 30 ) and the first furniture part ( 10 ) in a direction transverse (T) to the longitudinal direction (L) and being configured to interact with the neck portion ( 11   b ) of the dowel ( 11 ) to counteract removal of the dowel ( 11 ) from the locking portion ( 31   b ) along the longitudinal direction (L).

This application is a National Stage Application of PCT/SE2019/050835,filed 5 Sep. 2019, which claims benefit of Serial No. 1851077-6, filed12 Sep. 2018 in Sweden and which applications are incorporated herein byreference. To the extent appropriate, a claim of priority is made toeach of the above disclosed applications.

FIELD OF INVENTION

The invention relates to a connection arrangement for connecting a firstfurniture part to a second furniture part. The invention also relates toa connection arrangement for connecting a third furniture part to asecond furniture part. The invention also relates to a dowel configuredto be attached to a tubular furniture part, which may be said secondfurniture part. The invention also relates to a connection arrangementfor connecting the third furniture part to the second furniture partusing the dowel. The invention also relates to a furniture comprising afirst furniture part, a second furniture part and a third furniturepart, the furniture parts being connected to each other using saidconnection arrangements.

TECHNICAL BACKGROUND

Within the field of furniture assembly, it is often desired to connectfurniture parts to each other. Furniture parts may be connected byfastening means, such as screws or nails. A problem with such fasteningmeans is the need for tools, and sometimes specific tools, in order toapply them. They are often also sensitive to incorrect positioning; forinstance, incorrectly hammering a nail may lead to bending of the nailand/or damages to the furniture part, or even personal injury. The toolsmay also be difficult to use, especially for the disabled or elderly.Furthermore, the fastening means themselves may be prone to be lost, ordangerous for small children. Furniture parts may also be connected withdifferent kinds of locks. However, these may also require many parts,and may not present strong connections when subjected to wear over time.

For at least the reasons described above, a need exists for better waysto connect furniture parts.

SUMMARY OF INVENTION

It is an object of the invention to at least mitigate some of theproblems mentioned in the background.

This object has been achieved by a connection arrangement for connectinga first furniture part to a second furniture part,

wherein the first furniture part comprises:

a dowel extending from the first furniture part along a longitudinaldirection towards a free end of the dowel, the dowel having at least oneneck portion, and

one or more abutment surfaces,

wherein the second furniture part comprises:

a through-going opening extending through a wall of said secondfurniture part, and

one or more abutment surfaces on a first side of the wall, the firstside facing in a direction opposite the longitudinal direction, the oneor more abutment surfaces extending at least partially circumferentiallyaround or being distributed at least partially circumferentially aroundthe through-going opening,

wherein the connection arrangement further comprises a connection memberhaving a recess, the recess having a locking portion being configured toreceive the dowel by a relative motion between the connection member andthe first furniture part in a direction transverse to the longitudinaldirection and being configured to interact with the neck portion of thedowel to counteract removal of the dowel from the locking portion alongthe longitudinal direction,

wherein the first furniture part and the second furniture part areconfigured to be connected to each other by

inserting the dowel through the through-going opening from the firstside in an insertion direction along the longitudinal direction andbringing said abutment surfaces of the first and second furniture partsinto contact with each other, and

positioning the connection member on a second side, opposite the firstside, of the wall and moving the connection member relative to the dowelin a travel direction along the transverse direction such that the dowelslides into the locking portion,

wherein abutment surfaces of the first furniture part have an extensionin the longitudinal direction along a portion of the dowel and extendingat least partially circumferentially around or being distributed atleast partially circumferentially around the dowel,

wherein the abutment surfaces of the second furniture part extend fromthe first side of the wall in a direction opposite the longitudinaldirection and extend at least partially circumferentially around or isat least partially circumferentially distributed around thethrough-going opening, and

wherein the one or more abutment surfaces of the first furniture partand the one or more abutment surfaces of the second furniture part arepositioned on the respective furniture part such that, as the dowel isinserted into the through-going opening, the one or more abutmentsurfaces of the first furniture part abut the one or more abutmentsurfaces of the second furniture part and counteract relative movementbetween the first and second furniture parts along a directiontransverse to the longitudinal direction, preferably all directionsbeing transverse, to the longitudinal direction.

The second furniture part will thereby be correctly positioned andoriented relative to the first furniture part and the connection membermay be moved with ease and still provide a strong and stable connectionbetween the first and second furniture part.

It may be noted that the wordings first, second and third are merelylabels. The same label is used for the same part through-out thedescription and the claims. This may result in that in a specific partof the description related to a specific connection arrangement theremay be referred to a second and a third furniture part although there isin that context no mention of any first furniture part. However, it maybe noted that since the wordings first, second and third are merelylabels, it is conceivable to relabel the furniture parts in thedifferent parts of the description and in the different claims such thatthe labels first, second and third are introduced e.g. in the order ofappearance of that specific claim and in the associated description.However, since a single furniture may comprise a first, a second and athird furniture part and include two or more of the different connectionarrangements disclosed herein, the same label is used for the same partthrough-out the description and the claims rather than relabelling themin relation to the different connection arrangements.

It may be noted that the expression furniture part may relate todifferent kinds of furniture. It may e.g. relate to separate freestanding furniture, such as shelves, book shelves, TV-benches, sideboards, tables, cupboards, etc. It may also relate to built-in cabinetsor shelves, such as wall-hanged kitchen cabinets, wall-hanged kitchenshelves, etc. It may also relate to semi-built-in cabinets or shelves,such as wall hanged TV-benches, etc. Irrespective of it is built-in orfree standing it may not only relate to furniture designed for storage,such as cabinets and shelves, but may also relate to furniture parts forfurniture for other kinds of use. It may e.g. relate to furniture forsitting, such as sofas, benches, chairs, etc.

By providing such a connection arrangement with the dowel, thethrough-going opening, the abutment surfaces of the first and secondfurniture part, and the connection member formed to interact with thedowel and the second side of the second furniture part, it is possibleto provide a strong connection between the first and second furnitureparts with a connection arrangement that may be assembled into a lockingengagement without the use of any tools.

The design with the abutments surfaces and their positioning around thethrough-going opening and around the dowel provides a strong yet compactdesign. The design of the connection arrangement is especially usefulfor connecting tubular furniture parts to each other, where especiallythe tubular shape of the first furniture part may be used as theabutment surfaces of the first part and may be used to cover theconnection arrangement.

Moreover, the connection member may e.g. be inserted through an open endof the second furniture part and may as such also be used to provide anend cover to the open end.

The one or more abutment surfaces of the first furniture part maycomprise a tubular section extending along the longitudinal directionand extending circumferentially around a base portion of the dowel. Sucha design provides a strong abutment surface, makes the abutment surfaceeasy to manufacture and makes it possible to cover the connectionarrangement inside the tubular section. There is preferably acircumferentially extending gap between the base portion and theabutment surface formed by the tubular section.

The one or more abutment surfaces of the second furniture part areconfigured to be arranged inside and abut one or more abutments surfaceson an inside of the tubular section. Such a design provides a strongabutment surface, makes the abutment surface easy to manufacture andmakes it possible to cover the connection arrangement inside the tubularsection.

The one or more abutment surfaces of the second furniture part comprisesa tubular section extending from the first side of the wall in thedirection opposite the longitudinal direction and extendingcircumferentially around the through-going opening. Such a designprovides a strong abutment surface and makes the abutment surface easyto manufacture.

The dowel of the first furniture part may comprise a base portion havingan abutment surface adapted to, when the dowel is inserted through thethrough-going opening of the wall, abut an inner surface of saidthrough-going opening. This may be used to provide a strong and distinctpositioning of the first furniture part relative to the second furniturepart. If the base portion fits snugly into the through-going opening,the first and second furniture parts will be positioned with precisionin any direction in the plane of the wall of the second furniture part.

The recess has an entrance opening in a first surface forming a cornertogether with a second surface, the first surface being intended to facein the travel direction and the second surface being intended to facethe wall of the second furniture part. Such a recess may be said to bean open ended recess. Designing the connection member with such a recessmakes it easy to use; the user can position the first and secondfurniture parts in their intended position and then in astraight-forward motion push the connection member over the dowel suchthat the first and second furniture parts becomes interconnected. Such adesign also facilitates manufacture of the connection member. Theconnection member may e.g. be injection moulded in a single step processsince the entrance opening may be used as an extraction way for aremovable core in an injection moulding tool with the core having theshape of the recess.

The recess has a depth as seen from the second surface along a depthdirection extending along the longitudinal direction and may, as seenalong the depth direction, be provided with at least one neck sectionconfigured to interact with the neck portion of the dowel. The necksection may be formed by two oppositely arranged internal ridgesextending along the second surface and facing each other. Such a designprovides a strong connection and is easy to manufacture. The design isespecially suitable in combination with an open ended recess since theridges extending along the second surface allows for the extraction of aremovable core in an injection moulding tool. In a preferred embodiment,there is provided two neck sections one after the other as seen alongthe depth direction.

The first furniture part may be a tubular member having a main extensionalong the longitudinal direction, wherein the dowel is positioned partlyinto an open end of the tubular member such that it partly extendsinside the tubular member and partly extends past the tubular memberalong the longitudinal direction. As mentioned above, there ispreferably a circumferentially extending gap between the base portionand the abutment surface formed by the tubular section.

The dowel may be a separate element being attached to the firstfurniture part. The dowel may e.g. be attached to the first furniturepart by an attachment portion being positioned further into the tubularmember than the base portion.

The second furniture part may be a tubular member having an open endfacing in a direction opposite the travel direction of the connectionmember and having a main extension along the transverse direction. Thisis advantageous in that the connection member may be inserted into thetubular member and be moved along the travel direction to the lockingposition in a single straight-forward motion.

The above mentioned object has also been achieved by a furniturecomprising a second furniture part and a third furniture part, whereinthe first and second furniture parts are connected to each other by aconnection arrangement as introduced above and as disclosed in moredetail with reference to the detailed description and the appendeddrawings,

wherein the third furniture part is tubular, has an open end facing in alongitudinal direction and has a main extension along the longitudinaldirection,

wherein the second furniture part comprises or is configured to receivea dowel extending from the second furniture part along a directionopposite the longitudinal direction towards a free end of the dowel,wherein the dowel has at least one ridge followed, as seen along thelongitudinal direction, by at least one valley,

wherein the second and third furniture parts are connected to each otherby a connection arrangement which comprises:

a connection member having a recess and being configured to be insertedthrough the open end and into the third furniture part,

wherein the recess has a locking portion being configured to receive thedowel by a relative motion between the third furniture part and theconnection member in a direction transverse to the longitudinaldirection and being configured to interact with the valley of the dowelto counteract removal of the dowel from the locking portion along thelongitudinal direction,

wherein the second furniture part and the third furniture part areconfigured to be connected to each other by

inserting the connection member at least partly into the third furniturepart, and

moving the third furniture part with the connection member relative tothe dowel in a travel direction along the transverse direction such thatthe dowel slides into the locking portion of the connection member.

By using a connection member with such a designed recess and at leastpartly inserting it into the third furniture part in combination withthe use of such a designed dowel it is possible to provide a strongconnection of a tubular furniture part to a second furniture part and itis possible to provide a connection arrangement being covered by thetubular furniture part and a cover plate on the dowel.

As mentioned above, it may be noted that the wordings first, second andthird are merely labels. The same label is used for the same partthrough-out the description and the claims. This result in that in thisspecific part of the description related to this specific connectionarrangement there is referred to a second and a third furniture partalthough there is in this context no mention of any first furniturepart. However, it may be noted that since the wordings first, second andthird are merely labels, it is conceivable to relabel the furnitureparts in the different parts of the description and in the differentclaims such that the labels first, second and third are introduced e.g.in the order of appearance of that specific claim and in the associateddescription. However, since a single furniture may comprise a first, asecond and a third furniture part and include the initially disclosedconnection arrangement and also this immediately above disclosedconnection arrangement, the same label is used for the same partthrough-out the description and the claims rather than relabelling themin relation to the different connection arrangements.

The dowel may be configured to be attached to a tubular furniture partand to provide a part of a connection arrangement between the tubularfurniture part and a third furniture part, whereby the dowel maycomprise a connection portion having at least one ridge followed, asseen along

a longitudinal direction, by at least one valley, wherein the connectionportion is configured to extend from the second furniture part along adirection opposite the longitudinal direction towards a free end of thedowel, and

an attachment portion having a neck portion followed, as seen along thelongitudinal direction by a head portion, the head portion having in afirst transverse direction an extension being greater than an extensionof the neck portion in said first transverse direction and being greaterthan an extension of the head portion and an extension of the neckportion in a second transverse direction being orthogonal to the firsttransverse direction,

wherein the dowel is configured to be attached to the tubular furniturepart by

inserting the attachment portion in an elongated through-going openingextending through a first wall of the tubular furniture part, whereinthe dowel is during the insertion oriented with the first transversedirection being aligned with, or at least having a major componentalong, a longitudinal direction of the elongated through-going openingsuch that the head portion passes through the elongated through-goingopening, and thereafter

rotating the dowel in a first direction about an axis extending alongthe longitudinal direction such that the head portion interacts with aninside of the wall such that the head is prevented from being pulled outof the through-going opening.

A dowel of this kind is easy to attach to a tubular furniture part andit is capable of providing a strong connection arrangement by beingsecurely attached to the tubular furniture part and by presenting aconnecting portion capable of providing a strong connection with arecess having internal ridges interacting with the ridge and valley ofthe connection portion.

At least one end, preferably both ends, as seen along the firsttransverse direction, of the neck portion, may have

a rotation blocking corner configured to interact with an edge of theelongated opening to thereby prevent rotation of the dowel in a seconddirection, opposite the first direction, about the axis, and

a rotation allowing corner configured to pass along an edge of theelongated opening to thereby allowing rotation of the dowel in the firstdirection about the axis.

Thereby the dowel may be rotated from the orientation it has when beinginserted to an intended orientation in which the dowel is stopped fromfurther rotation.

Preferably are both ends each provided with a rotation blocking cornerand a rotation allowing corner wherein the two rotation blocking cornersare arranged diagonally relative to each other and the two rotationallowing corners are arranged diagonally relative to each other.

The head portion may be asymmetric in its design and the elongatedopening may be asymmetric in its design such that the head of the dowelis only insertable with the first transverse direction in one of twoopposing orientations in which the first transverse direction is alignedwith or has a major component along the longitudinal direction of theelongated through-going hold.

Thereby it may be controlled that the dowel is only insertable in theorientation that will, in combination with the rotation blocking androtation allowing corners result in the intended orientation of thedowel.

In the above disclosed connection arrangement for connecting a thirdfurniture part to a second furniture part, the second furniture part maybe a tubular furniture part provided with an elongated through-goingopening extending through a first wall of the tubular furniture part,and the dowel may be designed in accordance with the disclosure above inits most generic terms or in the preferred embodiments of the dowel.

The elongated through-going opening preferably has a width along atransverse direction of the elongated through-going opening beinggreater than the extension of the head portion and neck portion alongthe second transverse direction and being smaller than the extension ofthe head portion along the first transverse direction.

In one preferred embodiment, the inventive concept is realised in afurniture comprising a first furniture part, a second furniture part anda third furniture part, wherein the first and second furniture parts areconnected to each other by the connection arrangement for connecting afirst furniture part to a second furniture part as disclosed above inits most generic terms or in the preferred embodiments, and wherein thefirst and third furniture parts are connected to each other by theconnection arrangement for connecting a second furniture part to asecond furniture part as disclosed above in its most generic terms or inthe preferred embodiments.

The above mentioned object has also been achieved by a connectionarrangement for connecting a third furniture part to a second furniturepart,

wherein the third furniture part is tubular, has an open end facing in alongitudinal direction and has a main extension along the longitudinaldirection,

wherein the second furniture part comprises or is configured to receivea dowel extending from the second furniture part along a directionopposite the longitudinal direction towards a free end of the dowel,wherein the dowel has at least one ridge followed, as seen along thelongitudinal direction, by at least one valley,

wherein the connection arrangement further comprises:

a connection member having a recess and being configured to be insertedthrough the open end and into the third furniture part,

wherein the recess has a locking portion being configured to receive thedowel by a relative motion between the third furniture part and theconnection member in a direction transverse to the longitudinaldirection and being configured to interact with the valley of the dowelto counteract removal of the dowel from the locking portion along thelongitudinal direction,

wherein the second furniture part and the third furniture part areconfigured to be connected to each other by

inserting the connection member at least partly into the third furniturepart, and

moving the third furniture part with the connection member relative tothe dowel in a travel direction along the transverse direction such thatthe dowel slides into the locking portion of the connection member.

By using a connection member with such a designed recess and at leastpartly inserting it into the third furniture part in combination withthe use of such a designed dowel it is possible to provide a strongconnection of a tubular furniture part to a second furniture part and itis possible to provide a connection arrangement being covered by thetubular furniture part and a cover plate on the dowel.

As mentioned above, it may be noted that the wordings first, second andthird are merely labels. The same label is used for the same partthrough-out the description and the claims. This result in that in thisspecific part of the description related to this specific connectionarrangement there is referred to a second and a third furniture partalthough there is in this context no mention of any first furniturepart. However, it may be noted that since the wordings first, second andthird are merely labels, it is conceivable to relabel the furnitureparts in the different parts of the description and in the differentclaims such that the labels first, second and third are introduced e.g.in the order of appearance of that specific claim and in the associateddescription. However, since a single furniture may comprise a first, asecond and a third furniture part and include the initially disclosedconnection arrangement and also this immediately above disclosedconnection arrangement, the same label is used for the same partthrough-out the description and the claims rather than relabelling themin relation to the different connection arrangements.

The above mentioned object has also been achieved by a dowel configuredto be attached to a tubular furniture part and to provide a part of aconnection arrangement between the tubular furniture part and a thirdfurniture part, the dowel comprising

a connection portion having at least one ridge followed, as seen along alongitudinal direction, by at least one valley, wherein the connectionportion is configured to extend from the second furniture part along adirection opposite the longitudinal direction towards a free end of thedowel, and

an attachment portion having a neck portion followed, as seen along thelongitudinal direction by a head portion, the head portion having in afirst transverse direction an extension being greater than an extensionof the neck portion in said first transverse direction and being greaterthan an extension of the head portion and an extension of the neckportion in a second transverse direction being orthogonal to the firsttransverse direction,

wherein the dowel is configured to be attached to the tubular furniturepart by

inserting the attachment portion in an elongated through-going openingextending through a first wall of the tubular furniture part, whereinthe dowel is during the insertion oriented with the first transversedirection being aligned with, or at least having a major componentalong, a longitudinal direction of the elongated through-going openingsuch that the head portion passes through the elongated through-goingopening, and thereafter

rotating the dowel in a first direction about an axis extending alongthe longitudinal direction such that the head portion interacts with aninside of the wall such that the head is prevented from being pulled outof the through-going opening.

A dowel of this kind is easy to attach to a tubular furniture part andit is capable of providing a strong connection arrangement by beingsecurely attached to the tubular furniture part and by presenting aconnecting portion capable of providing a strong connection with arecess having internal ridges interacting with the ridge and valley ofthe connection portion.

At least one end, preferably both ends, as seen along the firsttransverse direction, of the neck portion, may have

a rotation blocking corner configured to interact with an edge of theelongated opening to thereby prevent rotation of the dowel in a seconddirection, opposite the first direction, about the axis, and

a rotation allowing corner configured to pass along an edge of theelongated opening to thereby allowing rotation of the dowel in the firstdirection about the axis.

Thereby the dowel may be rotated from the orientation it has when beinginserted to an intended orientation in which the dowel 51 is stoppedfrom further rotation.

Preferably are both ends each provided with a rotation blocking cornerand a rotation allowing corner wherein the two rotation blocking cornersare arranged diagonally relative to each other and the two rotationallowing corners are arranged diagonally relative to each other.

The head portion may be asymmetric in its design and the elongatedopening may be asymmetric in its design such that the head of the dowelis only insertable with the first transverse direction in one of twoopposing orientations in which the first transverse direction is alignedwith or has a major component along the longitudinal direction of theelongated through-going hold.

Thereby it may be controlled that the dowel is only insertable in theorientation that will, in combination with the rotation blocking androtation allowing corners result in the intended orientation of thedowel.

In the above disclosed connection arrangement for connecting a thirdfurniture part to a second furniture part, the second furniture part maybe a tubular furniture part provided with an elongated through-goingopening extending through a first wall of the tubular furniture part,and the dowel may be designed in accordance with the disclosure above inits most generic terms or in the preferred embodiments of the dowel.

The elongated through-going opening preferably has a width along atransverse direction of the elongated through-going opening beinggreater than the extension of the head portion and neck portion alongthe second transverse direction and being smaller than the extension ofthe head portion along the first transverse direction.

The above mentioned object has also been achieved by a connectionarrangement for connecting a third furniture part to a second furniturepart,

wherein the third furniture part is tubular, has an open end facing in alongitudinal direction and has a main extension along the longitudinaldirection,

wherein the second furniture part comprises or is configured to receivea dowel extending from the second furniture part along a directionopposite the longitudinal direction towards a free end of the dowel,wherein the dowel has at least one ridge followed, as seen along thelongitudinal direction, by at least one valley,

wherein the connection arrangement further comprises:

a connection member having a recess and being configured to be insertedthrough the open end and into the third furniture part,

wherein the recess has a locking portion being configured to receive thedowel by a relative motion between the third furniture part and theconnection member in a direction transverse to the longitudinaldirection and being configured to interact with the valley of the dowelto counteract removal of the dowel from the locking portion along thelongitudinal direction,

wherein the second furniture part and the third furniture part areconfigured to be connected to each other by

inserting the connection member at least partly into the third furniturepart, and

moving the third furniture part with the connection member relative tothe dowel in a travel direction along the transverse direction such thatthe dowel slides into the locking portion of the connection member.

By using a connection member with such a designed recess and at leastpartly inserting it into the third furniture part in combination withthe use of such a designed dowel it is possible to provide a strongconnection of a tubular furniture part to a second furniture part and itis possible to provide a connection arrangement being covered by thetubular furniture part and a cover plate on the dowel.

As mentioned above, it may be noted that the wordings first, second andthird are merely labels. The same label is used for the same partthrough-out the description and the claims. This result in that in thisspecific part of the description related to this specific connectionarrangement there is referred to a second and a third furniture partalthough there is in this context no mention of any first furniturepart. However, it may be noted that since the wordings first, second andthird are merely labels, it is conceivable to relabel the furnitureparts in the different parts of the description and in the differentclaims such that the labels first, second and third are introduced e.g.in the order of appearance of that specific claim and in the associateddescription. However, since a single furniture may comprise a first, asecond and a third furniture part and include the initially disclosedconnection arrangement and also this immediately above disclosedconnection arrangement, the same label is used for the same partthrough-out the description and the claims rather than relabelling themin relation to the different connection arrangements.

The above mentioned object has also been achieved by a dowel configuredto be attached to a tubular furniture part and to provide a part of aconnection arrangement between the tubular furniture part and a thirdfurniture part, the dowel comprising

a connection portion having at least one ridge followed, as seen along alongitudinal direction, by at least one valley, wherein the connectionportion is configured to extend from the second furniture part along adirection opposite the longitudinal direction towards a free end of thedowel, and

an attachment portion having a neck portion followed, as seen along thelongitudinal direction by a head portion, the head portion having in afirst transverse direction an extension being greater than an extensionof the neck portion in said first transverse direction and being greaterthan an extension of the head portion and an extension of the neckportion in a second transverse direction being orthogonal to the firsttransverse direction,

wherein the dowel is configured to be attached to the tubular furniturepart by

inserting the attachment portion in an elongated through-going openingextending through a first wall of the tubular furniture part, whereinthe dowel is during the insertion oriented with the first transversedirection being aligned with, or at least having a major componentalong, a longitudinal direction of the elongated through-going openingsuch that the head portion passes through the elongated through-goingopening, and thereafter

rotating the dowel in a first direction about an axis extending alongthe longitudinal direction such that the head portion interacts with aninside of the wall such that the head is prevented from being pulled outof the through-going opening.

A dowel of this kind is easy to attach to a tubular furniture part andit is capable of providing a strong connection arrangement by beingsecurely attached to the tubular furniture part and by presenting aconnecting portion capable of providing a strong connection with arecess having internal ridges interacting with the ridge and valley ofthe connection portion.

At least one end, preferably both ends, as seen along the firsttransverse direction, of the neck portion, may have

a rotation blocking corner configured to interact with an edge of theelongated opening to thereby prevent rotation of the dowel in a seconddirection, opposite the first direction, about the axis, and

a rotation allowing corner configured to pass along an edge of theelongated opening to thereby allowing rotation of the dowel in the firstdirection about the axis.

Thereby the dowel may be rotated from the orientation it has when beinginserted to an intended orientation in which the dowel 51 is stoppedfrom further rotation.

Preferably are both ends each provided with a rotation blocking cornerand a rotation allowing corner wherein the two rotation blocking cornersare arranged diagonally relative to each other and the two rotationallowing corners are arranged diagonally relative to each other.

The head portion may be asymmetric in its design and the elongatedopening may be asymmetric in its design such that the head of the dowelis only insertable with the first transverse direction in one of twoopposing orientations in which the first transverse direction is alignedwith or has a major component along the longitudinal direction of theelongated through-going hold.

Thereby it may be controlled that the dowel is only insertable in theorientation that will, in combination with the rotation blocking androtation allowing corners result in the intended orientation of thedowel.

In the above disclosed connection arrangement for connecting a thirdfurniture part to a second furniture part, the second furniture part maybe a tubular furniture part provided with an elongated through-goingopening extending through a first wall of the tubular furniture part,and the dowel may be designed in accordance with the disclosure above inits most generic terms or in the preferred embodiments of the dowel.

The elongated through-going opening preferably has a width along atransverse direction of the elongated through-going opening beinggreater than the extension of the head portion and neck portion alongthe second transverse direction and being smaller than the extension ofthe head portion along the first transverse direction.

In one preferred embodiment, the inventive concept is realised in afurniture comprising a first furniture part, a second furniture part anda third furniture part, wherein the first and second furniture parts areconnected to each other by the connection arrangement for connecting afirst furniture part to a second furniture part as disclosed above inits most generic terms or in the preferred embodiments, and wherein thefirst and third furniture parts are connected to each other by theconnection arrangement for connecting a second furniture part to asecond furniture part as disclosed above in its most generic terms or inthe preferred embodiments.

The invention may also in short be said to relate to a connectionarrangement for connecting a first furniture part to a second furniturepart, wherein the first furniture part comprises: a dowel and one ormore abutment surfaces extending circumferentially around or beingdistributed circumferentially around the dowel, wherein the secondfurniture part comprises: a through-going opening extending through awall and one or more abutment surfaces extending circumferentiallyaround or being distributed circumferentially around the through-goingopening, wherein the connection arrangement further comprises aconnection member having a recess, the recess having a locking portionbeing configured to receive the dowel by a relative motion between theconnection member and the first furniture part in a direction transverseto the longitudinal direction and being configured to interact with theneck portion of the dowel to counteract removal of the dowel from thelocking portion along the longitudinal direction.

BRIEF DESCRIPTION OF THE DRAWINGS

The invention will by way of example be described in more detail withreference to the appended schematic drawings, which shows a presentlypreferred embodiment of the invention.

FIG. 1 discloses a connection member provided with a recess.

FIG. 2 a discloses a first and a second furniture part.

FIG. 2 b is a partial cross-section of the view of FIG. 2 a.

FIG. 2 c discloses the first and second furniture parts being broughttogether and indicates the intended position of the connection member.

FIG. 2 d is a partial cross-section of the view of FIG. 2 c.

FIG. 2 e is a partial cross-section disclosing the fully assembledconnection arrangement.

FIG. 3 a discloses a dowel intended to be attached to the secondfurniture part in an elongated opening in the second furniture part.

FIG. 3 b discloses the dowel having been inserted into the elongatedopening and indicates a rotation of the dowel into an attached position.

FIG. 3 c discloses the dowel being attached to the second furniturepart.

FIG. 3 d discloses a connection member and the third furniture part andindicates the connection member being inserted into the third furniturepart.

FIG. 3 e indicates how the second and third furniture part are movedrelative to each other to provide a connection between them.

FIG. 3 f discloses the second and third furniture parts being connectedto each other.

FIG. 3 g discloses in planar view the elongated opening in the secondfurniture part.

FIG. 4 a discloses the components of an alternative embodiment ofconnecting a first furniture part to a second furniture part using aconnection member being insertable into a fourth furniture partextending along the second furniture part.

FIG. 4 b discloses the first and second parts being brought together andindicates the intended position of the alternative connection member.

FIG. 4 c discloses the fully assembled connection arrangement of thealternative embodiment.

FIG. 5 a discloses a first and a second furniture part and a connectionmember.

FIG. 5 b discloses the first and second furniture parts being broughttogether and indicates the intended position of the connection member.

FIG. 6 discloses a dowel intended to be inserted into the firstfurniture part.

FIG. 7 a discloses the orientation and insertion of the dowel into thefirst furniture part.

FIG. 7 b discloses the dowel being inserted into the first furniturepart.

FIG. 8 discloses a dowel intended to be attached to the second furniturepart in an elongated opening in the second furniture part.

DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS

With reference initially to FIG. 1 , FIG. 2 a and FIG. 5 a , there isdisclosed a connection arrangement for connecting a first furniture part10 to a second furniture part 20.

As shown in FIGS. 2 a-e , the first furniture part 10 is tubular and hasa main extension along a longitudinal direction L. The first furniturepart 10 comprises a dowel 11 and a tubular section 10 a forming anabutment surface 13. The dowel 11 extends from the first furniture part10 along a longitudinal direction L towards a free end 11 c of the dowel11. The dowel 11 has as e.g. indicated in FIG. 2 c , two neck portions11 b. The abutment surface 13 has an extension in the longitudinaldirection L along a base portion 11 a of the dowel 11. The abutmentsurface 13 also extends circumferentially C around the dowel 11. Asshown in FIG. 2 d , there is a circumferentially extending gap G13between the base portion 11 a and the abutment surface 13 formed by thetubular section 10 a. In the disclosed embodiment, the dowel 11 and thethrough-going opening 22 have a circular cross-section. However, thedowel 11 and the through-going opening 22 may basically have any desiredcross-sectional shape. A circular shape is preferred from amanufacturing perspective. Non-circular shapes may be preferred from theperspective that non-circular shapes may be used to define a specificrotational relative orientation between the first and second furnitureparts 10, 20 about the longitudinal direction L.

The second furniture part 20 is tubular and comprises a through-goingopening 22 and an abutment surface 23. The through-going opening 22extends through a wall 21 of said second furniture part 20. The abutmentsurfaces 23 is formed of a tubular section 23′ extending from a firstside 21 a of the wall 21 in a direction L′ opposite the longitudinaldirection L. The abutment surface 23 also extends circumferentially Caround the through-going opening 22. The second furniture part 20 has amain extension along a transverse direction T being transverse to thelongitudinal direction L.

It may be noted that in the preferred embodiment, the first furniturepart 10 is formed of from a square or rectangular tube and the abutmentsurface 13 extending around the dowel 11 is a continuous surface formedof the four sides of the cross-section of the square or rectangulartube.

As shown in FIG. 2 c , the abutment surface 13 of the first furniturepart 10 and the abutment surface 23 of the second furniture part 10 arepositioned on the respective furniture part 10, 20 such that, as thedowel 11 is inserted into the through-going opening 22, the abutmentsurface 13 of the first furniture part 10 abut the abutment surface 23of the second furniture part 10 and counteract relative movement betweenthe first and second furniture parts 10, 20 along all directions Ttransverse to the longitudinal direction L.

As indicated in FIGS. 2 a-e , and disclosed in more detail in FIG. 1 ,the connection arrangement further comprises a connection member 30. Theconnection member 30 has a recess 31 which has a locking portion 31 bbeing configured to receive the dowel 11 by a relative motion betweenthe connection member 30 and the first furniture part 10 in a directiontransverse T to the longitudinal direction L and being configured tointeract with the neck portion 11 b of the dowel 11 to counteractremoval of the dowel 11 from the locking portion 31 b along thelongitudinal direction L.

As shown in FIG. 1 , the recess 31 has an entrance opening 31 a in afirst surface 32 a forming a corner 32 c together with a second surface32 b. The first surface 32 a is intended to face in the travel directionB and the second surface 32 b is intended to face the wall 21 of thesecond furniture part 20. Such a recess 31 may be said to be an openended recess 31. As indicated in FIGS. 2 b-d , connection member 30 withsuch a recess 31 makes is easy to use; the user can position the firstand second furniture parts 10, 20 in their intended position and then ina straight-forward motion push the connection member 30 over the dowel11 such that the first and second furniture parts 10, 20 becomesinterconnected. Such a design also facilitates manufacture of theconnection member 30. The connection member 30 may e.g. be injectionmoulded in a single step process since the entrance opening 31 a may beused as an extraction way for a removable core in an injection mouldingtool with the core having the shape of the recess 31.

The recess 21 has a depth d31 as seen from the second surface 32 b alonga depth direction D extending along the longitudinal direction L. Therecess is, as seen along the depth direction D, provided with two necksections 31 c, 31 c′ configured to interact with the respective neckportion 11 b of the dowel 10. The two neck sections 31 c, 31 c′ arearranged one after the other as seen along the depth direction D.Alternatively, it may be said that the neck sections 31 c, 31 c′ areprovided at different depths of the recess 31. Each neck section 31 c,31 c′ is be formed by two oppositely arranged internal ridges 33 a, 33 bextending along the second surface 32 b and facing each other.

As shown in FIG. 1 and e.g. also in FIGS. 2 c-d , the connection member30 has a body part 30′ in which the recess 31 is formed and an end part30″. The body par 30′ is configured to be inserted into the tubularmember 20. The end part 30″ has slightly greater dimensions across theinsertion direction B and is configured to close the end of the tubularmember 20. The interaction between the end part 30″ and the end of thetubular member 20 may also be used to provide a stop for the connectionmember's 30 movement along the direction B as indicated by arrow K inFIG. 2 d.

As indicated in FIGS. 2 a-e , the first furniture part 10 and the secondfurniture part 20 are configured to be connected to each other by

inserting as shown in FIG. 2 a the dowel 11 through the through-goingopening 22 from the first side 21 a in an insertion direction A alongthe longitudinal direction L and bringing as shown in FIG. 2 b-c saidabutment surfaces 13, 23 of the first and second furniture parts 10, 20into contact with each other, and

positioning the connection member 30 on a second side 21 b, opposite thefirst side 21 a, of the wall 21 as indicated in FIG. 2 b-c and movingthe connection member 30 relative to the dowel 11 in a travel directionB along the transverse direction T such that the dowel 11 slides intothe locking portion 31 b to the position indicated in FIG. 2 d.

The connection member 30 is positioned on the second side 21 b by beinginserted through an open end 20 c in the second furniture part 20, theopen end 20 c facing in a direction B′ opposite the travel direction Bof the connection member 30.

As shown in FIG. 2 d , the abutment surface 23 of the second furniturepart 10 is configured to be arranged inside and abut the abutmentsurface 13 on an inside of the tubular section 10 a. The extension ofthe tubular section 10 a along the longitudinal direction is such thatan open end 10 c of the tubular section 10 a abuts the first side 21 aof the wall 21 thereby covering these parts of the connectionarrangement inside the tubular section 10 a.

As shown in FIGS. 2 c-e , the dowel 10 is positioned partly into theopen end 10 c of the tubular member 10 such that it partly extendsinside the tubular member 10 and partly extends past the open end 10 cof the tubular member 10 along the longitudinal direction L.

The dowel 11 is a separate element being attached to the first furniturepart 10. The dowel 11 may e.g. as disclosed in FIGS. 2 c-e be attachedto the first furniture part 10 by an attachment portion 11 d beingpositioned further into the tubular member 10 than the base portion 11a.

In this embodiment, the base portion 11 a may form an abutment surfacewhich, when the dowel 11 is inserted through the through-going opening22 of the wall 21, abuts an inner surface 22 a of the through-goingopening 22.

In FIGS. 5 a-b , FIG. 6 and FIGS. 7 a-b , there is disclosed analternative embodiment to the embodiment shown in FIGS. 2 a-e . In thisembodiment, the abutment surface 13 of the first furniture part 10 isformed of the end surface of the tubular member 10 as indicated e.g. inFIGS. 5 a and 7 a . The abutment surface 23 of the second part 20 isformed of the outer surface 23 (or alternatively expressed; the firstside 21 a) of the wall 21 as indicated in FIG. 5 a.

The dowel 11 is formed of a sheet metal piece being shaped basicallyinto a longitudinally extending member having a U-shaped cross-section.It is oriented with its continuous curved bottom end facing theconnection member 30. The legs of the U-shaped cross-section extend inparallel with the insertion direction B by which the connection member30 is inserted into the second furniture part 20. The dowel 11 has asseen along the longitudinal direction L an attachment portion 11 d, abase portion 11 a, and a plurality of alternatingly arranged ridges 11 cand valleys 11 b. The attachment portion 11 d is inserted into thetubular member 10 and is attached, such as by welding, to the inside ofthe tubular member 10.

As may be noted from FIGS. 5 a-b , there are no longitudinally extendingabutment surfaces 13, 23 in this embodiment. However, a locking effectpreventing transversal relative movement of the first and secondfurniture parts 10, 20, is in this embodiment provided by the baseportion 11 a forming an abutment surface which, when the dowel 11 isinserted through the through-going opening 22 of the wall 21, abuts aninner surface or edge surface 22 a of the through-going opening 22. Thecurved continuous bottom end of the U-shaped cross-section abuts acongruently shaped edge surface 22 a. The free ends of the legs of theU-shaped cross section of the dowel 11 abuts two abutment surfacesformed in the through-going opening 22, the two abutment surfaces facingin a direction opposite the insertion direction B along which theconnection member 30 is inserted into the second furniture part 20. Theshape of the through-going opening may be shaped differently than thecross-sectional shape of the dowel 11 as long as the above mentionedabutment surfaces are provided.

With reference to FIGS. 3 a-g , there is disclosed a connectionarrangement for connecting a third furniture part 40 to a secondfurniture part 20.

The third furniture part 40 is tubular and has a main extension alongthe longitudinal direction L. The third furniture part 40 has an openend 41 facing in the longitudinal direction L as shown in FIG. 3 d.

As shown in FIGS. 3 a-c , the second furniture part 20 is configured toreceive a dowel 51. The dowel 51 extends in the attached position fromthe second furniture part 20 along a direction L′ opposite thelongitudinal direction L towards a free end 51 c of the dowel 51. Asshown e.g. in FIG. 3 a , the dowel 51 has two ridges 51 b each followed,as seen along the longitudinal direction L, by a valley 51 c.

As shown in FIG. 3 d , the connection arrangement further comprises aconnection member 60 being configured to be inserted through the openend 41 and into the third furniture part 40. The connection member 60has a recess 31 basically designed in the same manner as the recess 31of the connection member 30. The recess 31 of the connection member 60has a locking portion 31 b being configured to receive the dowel 51 by arelative motion between the third furniture part 40 and the connectionmember 60 in a direction transverse T to the longitudinal direction Land being configured to interact with the valleys 51 c of the dowel 51to counteract removal of the dowel 51 from the locking portion 31 balong the longitudinal direction L.

The second furniture part 20 and the third furniture part 40 areconfigured to be connected to each other by:

inserting the connection member 60 at least partly into the thirdfurniture part 40 as shown in FIG. 3 d , and

moving the third furniture part 40 with the connection member 60relative to the dowel 51 in a travel direction B along the transversedirection T such that the dowel 51 slides into the locking portion 31 bof the connection member 60 as shown in FIG. 3 e.

In FIG. 3 f , the second and third furniture parts 20, 40 are shown inthe connected state. It may be noted that the connection arrangement iscovered by the tubular furniture part 40 and a cover plate 51 d on thedowel 51.

The dowel 51 will in the following be disclosed in more detail withreference mainly to FIGS. 3 a-c . As mentioned above, the dowel 51 isconfigured to be attached to a tubular furniture part 20 and to providea part of a connection arrangement between the tubular furniture part 20and a third furniture part 40. The dowel 51 comprises in short aconnection portion 51′ and an attachment portion 51″.

The connection portion 51′ has the above mentioned two ridges 51 b eachfollowed, as seen along the longitudinal direction L, by a valley 51 c.The connection portion 51′ is configured to extend from the secondfurniture part 20 along the direction L′ opposite the longitudinaldirection L towards the free end 51 c of the dowel 51.

The attachment portion 51″ has a neck portion 52 followed, as seen alongthe longitudinal direction L, by a head portion 53. The head portion 53has in a first transverse direction T′ an extension being greater thanan extension of the neck portion 52 in said first transverse directionT′ and being greater than an extension of the head portion 53 and anextension of the neck portion 52 in a second transverse direction T″being orthogonal to the first transverse direction T′.

As shown in FIG. 3 a , the second furniture part 20 is provided with anelongated through-going opening 25 extending through a first wall 21 ofthe tubular furniture part 20. The elongated through-going opening 25has, along its longitudinal extension, a width W (see FIG. 3 g ) along atransverse direction T25 of the elongated through-going opening 25 beinggreater than the extension of the head portion 53 and neck portion 52along the second transverse direction T″ and being smaller than theextension of the head portion 53 along the first transverse directionT′.

The dowel 51 is configured to be attached to the tubular furniture part20 by

inserting F the attachment portion 51″ in the elongated through-goingopening 25 with the dowel 51, during the insertion, being oriented withthe first transverse direction T′ being aligned with, or at least havinga major component along, a longitudinal direction L25 of the elongatedthrough-going opening 25 such that the head portion 53 passes throughthe elongated through-going opening 25, and thereafter

rotating as shown in FIG. 3 b the dowel 51 in a first direction H aboutan axis G extending along the longitudinal direction L such that thehead portion 53 interacts with an inside 21 b of the wall 21 such thatthe head 53 is prevented from being pulled out of the through-goingopening 25.

The dowel 51 is shown in its attached position in FIG. 3 c.

As shown in the cross-section A-A of FIG. 3 a , both ends 52 a, 52 b, asseen along the first transverse direction T′, of the neck portion 52,has

a rotation blocking corner 52 a′ configured to interact with an edge ofthe elongated opening 25 to thereby prevent rotation of the dowel 51 ina second direction, opposite the first direction H, about the axis G,and

a rotation allowing corner 52 a″ configured to pass along an edge of theelongated opening 25 to thereby allowing rotation of the dowel 51 in thefirst direction H about the axis G.

Thereby the dowel 51 may be rotated from the orientation it has whenbeing inserted to an intended orientation in which the dowel 51 isstopped from further rotation.

The two rotation blocking corners 52 a′, 52 b′ are arranged diagonallyrelative to each other and the two rotation allowing corners 52 a″, 52b″ are arranged diagonally relative to each other.

The head portion 53 may be asymmetric in its design and the elongatedopening 25 may be asymmetric in its design such that the head 53 of thedowel 51 is only insertable with the first transverse direction T′ inone of two opposing orientations in which the first transverse directionT′ is aligned with or has a major component along the longitudinaldirection L25 of the elongated through-going hold 25.

In FIGS. 3 a and 3 g , it is shown that the head portion 53 has at oneend 53 a thereof relatively sharp corners and at the other end 53 bthereof it has relatively rounded corners. Similarly, elongated opening25 has at one end 25 a thereof relatively sharp corners and at the otherend 25 b thereof it has relatively rounded corners. The radiuses of thecorners are chosen such that the head 53 may only be inserted into theelongated opening 25 with the relatively sharp corners at the end 53 aof the head 53 facing the end 25 a of the elongated opening 25 havingthe relatively sharp corners.

Thereby it may be controlled that the dowel 51 is only insertable in theorientation that will, in combination with the rotation blocking 52 a′,52 b′ and rotation allowing corners 52 a″, 52 b″ result in the intendedorientation of the dowel 51.

In an alternative embodiment shown in FIG. 8 , the elongatedthrough-going opening 125 may be extended along the extension of thesecond furniture part 20. In other words, the first transverse directionT′ and the second transverse direction T″ described above would switchplaces. In this alternative embodiment the rotation blocking corners ofthe neck portion is omitted and instead rotation is blocked usingrotation blocking corners 153 a″, 153 b″ at the ends 153 a, 153 b of thehead portion 153. The rotation blocking corners 153 a″, 153 b″ iscooperating with the inner walls of the second furniture part 20 toprevent further rotation of the dowel 51. Thereby there is no need foran edge at the elongated opening to prevent rotation. Moreover, the headportion 153 comprises rotation allowing corners 153 a′, 153 b′configured to allow rotation of the dowel 51 in the first direction H inthe same manner as described with reference to FIG. 3 b.

In one preferred embodiment, the inventive concept is realised in afurniture comprising a first furniture part 10, a second furniture part20 and a third furniture part 40, wherein the first and second furnitureparts 10, 20 are connected to each other by the connection arrangementfor connecting a first furniture part 10 to a second furniture part 20as disclosed above in its most generic terms or in the preferredembodiments, and wherein the first and third furniture parts 10, 40 areconnected to each other by the connection arrangement for connecting asecond furniture part 10 to a second furniture part 20 as disclosedabove in its most generic terms or in the preferred embodiments.

In FIGS. 4 a-c , there is shown a connection arrangement between a firstfurniture part 10 and a second furniture part 20 similar to theconnection arrangement of FIGS. 2 a-e . However, instead of using aconnection member 30 of FIG. 1 , there is in this latter connectionarrangement used a connection member 80 which is insertable or form partof a tubular member 70. The tubular member 70 is intended to extend as acontinuation of the second furniture part 20. This design is e.g.suitable to provide a leg 70 at the bottom of the furniture. Theconnection member 80 is provided with a recess 31 of the kind disclosedin detail with reference to FIG. 1 .

It is also conceivable to combine the connection arrangement of FIGS. 1and 2 a-e with the connection arrangement of FIGS. 4 a-c in a designwhere the furniture part 70 is provided with or receives a connectionmember 80 at one end thereof and is provided with a through-goingopening 22 and abutment surfaces 23 at the other end thereof. With sucha design, a plurality of such furniture parts 70 may be stacked on topof each other and connect with a first furniture part 10 at each suchinterconnection. At the top of such a stack the connection arrangementcould end with a connection arrangement as disclosed in FIGS. 1 and 2a-e and at the bottom of such a stack the connection arrangement couldend with a connection arrangement as disclosed in FIGS. 4 a -c.

It may be noted that the furniture shown in the various figures asending with a connection arrangement as shown in FIGS. 4 a-c mayalternatively end at both ends of the second furniture part 20 with aconnection arrangement of the kind disclosed in FIGS. 1 and 2 a-e.

It is contemplated that there are numerous modifications of theembodiments described herein, which are still within the scope of theinvention as defined by the appended claims.

The one or more abutment surfaces 13 may for instance be a plurality ofseparate abutment surfaces each extending from a first side 21 a of thewall 21 in a direction L′ opposite the longitudinal direction L andbeing distributed relative to each other circumferentially C around thedowel 11.

The one or more abutment surfaces 23 may for instance be a plurality ofseparate abutment surfaces each extending from a first side 21 a of thewall 21 in a direction L′ opposite the longitudinal direction L andbeing distributed relative to each other circumferentially C around thethrough-going opening 22,

It may be noted that in the preferred embodiment, the various furnitureparts 10, 20, 40 are formed of from a square or rectangular tube.However, the furniture parts do not have to be formed from tubes. Theymay be solid parts provided with recesses or openings providing thespaces or cavities necessary to receive the dowels, connecting members,etc., which spaces or cavities are provided by the interior of the tubesof the preferred embodiments. It may also be noted that the shapes, ofthe tubular parts or solid parts, need not be square or rectangular.Other shapes, such as other kinds of polygons, circles, ovals,ellipsoids, are also conceivable.

As mentioned above, it may be noted that the expression furniture partmay relate to different kinds of furniture. It may e.g. relate toseparate free standing furniture, such as shelves, book shelves,TV-benches, side boards, tables, cupboards, etc. It may also relate tobuilt-in cabinets or shelves, such as wall-hanged kitchen cabinets,wall-hanged kitchen shelves, etc. It may also relate to semi-built-incabinets or shelves, such as wall hanged TV-benches, etc. Irrespectiveof it is built-in or free standing it may not only relate to furnituredesigned for storage, such as cabinets and shelves, but may also relateto furniture parts for furniture for other kinds of use. It may e.g.relate to furniture for sitting, such as sofas, benches, chairs, etc.

The invention claimed is:
 1. Connection arrangement for connecting afirst furniture part to a second furniture part, wherein the firstfurniture part comprises: a dowel extending from the first furniturepart along a longitudinal direction towards a free end of the dowel, thedowel having at least one neck portion, and one or more abutmentsurfaces, wherein the second furniture part comprises: a through-goingopening extending through a wall of said second furniture part, and oneor more abutment surfaces on a first side the wall, the first sidefacing in a direction opposite the longitudinal direction, the one ormore abutment surfaces extending at least partially circumferentiallyaround or being distributed at least partially circumferentially aroundthe through-going opening, wherein the connection arrangement furthercomprises a connection member having a recess, the recess having alocking portion being configured to receive the dowel by a relativemotion between the connection member and the first furniture part in adirection transverse to the longitudinal direction and being configuredto interact with the neck portion of the dowel to counteract removal ofthe dowel from the locking portion along the longitudinal direction,wherein the first furniture part and the second furniture part areconfigured to be connected to each other by inserting the dowel throughthe through-going opening from the first side in an insertion directionalong the longitudinal direction and bringing said abutment surfaces ofthe first and second furniture parts into contact with each other, andpositioning the connection member on a second side, opposite the firstside of the wall and moving the connection member relative to the dowelin a travel direction along the transverse direction such that the dowelslides into the locking portion, wherein the abutment surfaces of thefirst furniture part have an extension in the longitudinal directionalong a portion of the dowel and extending at least partiallycircumferentially around or being distributed at least partiallycircumferentially around the dowel, the abutment surfaces the secondfurniture part extend from the first side of the wall in a directionopposite the longitudinal direction and extend at least partiallycircumferentially around or is at least partially circumferentiallydistributed around the through-going opening, and the one or moreabutment surfaces of the first furniture part and the one or moreabutment surfaces of the second furniture part are positioned on therespective furniture part such that, as the dowel is inserted into thethrough-going opening, the one or more abutment surfaces of the firstfurniture part abut the one or more abutment surfaces of the secondfurniture part and counteract relative movement between the first andsecond furniture parts along a direction transverse to the longitudinaldirection.
 2. Connection arrangement according to claim 1, wherein saidone or more abutment surfaces of the first furniture part comprises atubular section extending along the longitudinal direction and extendingcircumferentially around a base portion of the dowel.
 3. Connectionarrangement according to claim 2, wherein said one or more abutmentsurfaces of the second furniture part e configured to be arranged insideand abut one or more abutments surfaces on an inside of the tubularsection.
 4. Connection arrangement according to claim 1, wherein saidone or more abutment surfaces of the second furniture part comprises atubular section extending from the first side of the wall in thedirection opposite the longitudinal direction and extendingcircumferentially around the through-going opening.
 5. The connectionarrangement according to claim 1, wherein the dowel of the firstfurniture part comprises a base portion having an abutment surfaceadapted to, when the dowel is inserted through the through-going openingof the wall, abut an inner surface of said through-going opening. 6.Connection arrangement according to claim 1, wherein the recess has anentrance opening in a first surface forming a corner together with asecond surface, the first surface being intended to face in the traveldirection and the second surface being intended to face the wall of thesecond furniture part.
 7. Connection arrangement according to claim 1,wherein the recess has a depth as seen from the second surface along adepth direction extending along the longitudinal direction and is, asseen along the depth direction, provided with at least one neck sectionconfigured to interact with the neck portion of the dowel, wherein theneck section is formed by two oppositely arranged internal ridgesextending along the second surface and facing each other.
 8. Connectionarrangement according to claim 1, wherein the first furniture part is atubular member having a main extension along the longitudinal direction,wherein the dowel is positioned partly into an open end of the tubularmember such that it partly extends inside the tubular member and partlyextends past the tubular member along the longitudinal direction. 9.Connection arrangement according to claim 1, wherein the secondfurniture part is a tubular member having an open end facing in adirection opposite the travel direction of the connection member andhaving a main extension along the transverse direction.
 10. Furniturecomprising a first furniture part, a second furniture part and a thirdfurniture part, wherein the first and second furniture parts areconnected to each other by a connection arrangement according to claim1, wherein the third furniture part is tubular, has an open end facingin a longitudinal direction and has a main extension along thelongitudinal direction, wherein the second furniture part comprises oris configured to receive a dowel extending from the second furniturepart along a direction opposite the longitudinal direction towards afree end of the dowel, wherein the dowel has at least one ridgefollowed, as seen along the longitudinal direction, by at least onevalley, wherein the second and third furniture parts are connected toeach other by a connection arrangement which comprises: a connectionmember having a recess and being configured to be inserted through theopen end and into the third furniture part, wherein the recess has alocking portion being configured to receive the dowel by a relativemotion between the third furniture part and the connection member in adirection transverse to the longitudinal direction and being configuredto interact with the valley of the dowel counteract removal of the dowelfrom the locking portion along the longitudinal direction, wherein thesecond furniture part and the third furniture part are figured to beconnected to each other by inserting the connection member at leastpartly into the third furniture part, and moving the third furniturepart with the connection member relative to the dowel in a traveldirection along the transverse direction such that the dowel slides intothe locking portion of the connection member.
 11. Furniture according toclaim 10, wherein the dowel is configured to be attached to a tubularfurniture part and to provide a part of a connection arrangement betweenthe tubular furniture part and a third furniture part, the dowelcomprising a connection portion having at least one ridge followed, asseen along a longitudinal direction, by at least one valley, wherein theconnection portion is configured to extend from the second furniturepart along a direction opposite the longitudinal direction towards afree end of the dowel, and an attachment portion having a neck portionfollowed, as seen along the longitudinal direction by a head portion,the head portion having in a first transverse direction an extensionbeing greater than an extension of the neck portion in said firsttransverse direction and being greater than an extension of the headportion and an extension of the neck portion in a second transversedirection being orthogonal to the first transverse direction, whereinthe dowel is configured to be attached to the tubular furniture part byinserting the attachment portion in an elongated through-going openingextending through a first wall of the tubular furniture part, whereinthe dowel is during the insertion oriented with the first transversedirection being aligned with, or at least having a major componentalong, a longitudinal direction of the elongated through-going openingsuch that the head portion passes through the elongated through-goingopening, and thereafter rotating the dowel in a first direction about anaxis extending along the longitudinal direction such that the headportion interacts with an inside of the wall such that the head isprevented from being pulled out of the through-going opening. 12.Furniture according to claim 11, wherein at least one end, preferablyboth ends, as seen along the first transverse direction, of the neckportion, has a rotation blocking corner configured to interact with anedge of the elongated opening to thereby prevent rotation of the dowelin a second direction, opposite the first direction, about the axis, anda rotation allowing corner configured to pass along an edge of theelongated opening to thereby allowing rotation of the dowel in the firstdirection about the axis.
 13. Furniture according to claim 12, whereinthe head portion is asymmetric in its design and the elongated openingis asymmetric in its design such that the head of the dowel is onlyinsertable with the first transverse direction in one of two opposingorientations in which the first transverse direction is aligned with orhas a major component along the longitudinal direction of the elongatedthrough-going hold.
 14. Furniture according to claim 11, wherein thetubular furniture part is provided with an elongated through-goingopening extending through a first wall of the tubular furniture part,and wherein the dowel is designed and attached.
 15. Furniture accordingto claim 14, wherein the elongated through-going opening has a widthalong a transverse direction of the elongated through-going openingbeing greater than the extension of the head portion and neck portionalong the second transverse direction and being smaller than theextension of the head portion along the first transverse direction.